HS Sample Set 4, Round 6 from NSB
The emission of helium nuclei refers to which form of radiation? W) Alpha X) Beta Y) Delta Z) Gamma
W: W) Alpha
X: X) Beta
Y: Y) Delta
Z: Z) Gamma
Answer: W) W) Alpha
The atomic matter converted into energy by the atomic bomb in World War II at Hiroshima weighed about as much as a: W) Penny X) Bowling ball Y) Refrigerator Z) Whale
W: W) Penny
X: X) Bowling ball
Y: Y) Refrigerator
Z: Z) Whale
Answer: W) W) Penny
If the side lengths of a triangle are 3 meters, 4 meters, and 5 meters, then what is the area in square meters?
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If two angles of a triangle inscribed in a circle are 40° and 110°, what is the degree measure of the arc intercepted by the third angle? W) 15 X) 30 Y) 60 Z) 210
W: W) 15
X: X) 30
Y: Y) 60
Z: Z) 210
Answer: Y) Y) 60
Which of the following consumes the most energy? W) All Personal vehicles X) All Trains Y) All Airplanes Z) All Buses
W: W) All Personal vehicles
X: X) All Trains
Y: Y) All Airplanes
Z: Z) All Buses
Answer: W) W) All Personal vehicles
Electric vehicles are propelled by electric motors powered by rechargeable battery packs. Which of the following is NOT an accurate battery-related issue for electric vehicles? W) They need to be recharged after 100 to 200 miles of use X) They are inefficient Y) They are expensive Z) They are heavy
W: W) They need to be recharged after 100 to 200 miles of use
X: X) They are inefficient
Y: Y) They are expensive
Z: Z) They are heavy
Answer: X) X) They are inefficient
Which of the following is NOT a major process for mechanical weathering of rock? W) Frost wedging X) Oxidation Y) Abrasion Z) Pressure-release fracturing
W: W) Frost wedging
X: X) Oxidation
Y: Y) Abrasion
Z: Z) Pressure-release fracturing
Answer: X) X) Oxidation
If you place a drop of strong acid on a limestone rock, what gas is released?
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Given that nuclear reactions are a great source of energy, which of the following represents one of the main concerns about nuclear energy production? W) The expense of building and maintaining safe nuclear power plants X) A shortage in uranium Y) Waste accumulation Z) Lack of knowledge about the technique
W: W) The expense of building and maintaining safe nuclear power plants
X: X) A shortage in uranium
Y: Y) Waste accumulation
Z: Z) Lack of knowledge about the technique
Answer: Y) Y) Waste accumulation
Which of the following is a characteristic of alpha decay? W) Alpha decay occurs in heavy nuclei where the electrostatic repulsion between the protons in the nucleus is large X) The mass of a nucleus that undergoes alpha decay will be changed by only a small amount Y) Neither the mass number nor the atomic number is changed Z) The atomic number increases by 1
W: W) Alpha decay occurs in heavy nuclei where the electrostatic repulsion between the protons in the nucleus is large
X: X) The mass of a nucleus that undergoes alpha decay will be changed by only a small amount
Y: Y) Neither the mass number nor the atomic number is changed
Z: Z) The atomic number increases by 1
Answer: W) W) Alpha decay occurs in heavy nuclei where the electrostatic repulsion between the protons in the nucleus is large
The chairs in a theater are numbered. Robert painted all of the chairs from #25 to #35, inclusive. How many chairs did he paint?
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Sally plans to sell tickets for the school play. It costs \$150 to print the tickets. If she sells the tickets for \$4 each, how many must she sell to make a profit of at least \$500?
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Which of the following best describes the flow of energy in an ecosystem? W) Sun → heterotroph → autotroph X) Chemotroph → autotroph → heterotroph Y) Detritovore → autotroph → heterotroph Z) Sun → autotroph → heterotroph
W: W) Sun → heterotroph → autotroph
X: X) Chemotroph → autotroph → heterotroph
Y: Y) Detritovore → autotroph → heterotroph
Z: Z) Sun → autotroph → heterotroph
Answer: Z) Z) Sun → autotroph → heterotroph
Great Lakes coastal wetlands occur along the Great Lakes shoreline and portions of the tributary rivers and streams. Which of the following are NOT abiotic factors that influence patterns of species co-occurrence and distributions? W) Kinds of aquatic system X) Fluctuations in Great Lakes water levels Y) Physical and chemical characteristics of the bedrock Z) Vegetation zonation
W: W) Kinds of aquatic system
X: X) Fluctuations in Great Lakes water levels
Y: Y) Physical and chemical characteristics of the bedrock
Z: Z) Vegetation zonation
Answer: Z) Z) Vegetation zonation
Circling near the edge of the Solar System, the Oort Cloud is a collection of what?
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Which of the following is NOT true about quasars? W) They give off enormous amounts of energy X) They can be seen with the unaided eye Y) They may emit gamma rays Z) Some theorists say that there are black holes in the center of the galaxies in which the quasars are located
W: W) They give off enormous amounts of energy
X: X) They can be seen with the unaided eye
Y: Y) They may emit gamma rays
Z: Z) Some theorists say that there are black holes in the center of the galaxies in which the quasars are located
Answer: X) X) They can be seen with the unaided eye
What is the greatest common factor of 120 and 165?
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Simplify the following expression: (tan x + cot x)(sin x cos x).
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Identify the substance being reduced in the following reaction: 3 Zn + Fe₂O₃ → 2 Fe + 3 ZnO
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Which of the following substances could be a precipitate in a double replacement reaction in an aqueous solution? W) Silver chloride X) Barium hydroxide Y) Lead nitrate Z) Zinc chloride
W: W) Silver chloride
X: X) Barium hydroxide
Y: Y) Lead nitrate
Z: Z) Zinc chloride
Answer: W) W) Silver chloride
Which of the following is NOT a flavor of quark? W) Charm X) Weird Y) Top Z) Down
W: W) Charm
X: X) Weird
Y: Y) Top
Z: Z) Down
Answer: X) X) Weird
Amy is pulling a heavy cart. It is harder to start pulling the cart than to keep the cart in motion because the kinetic frictional force: W) Has decreased X) Is zero once the cart starts moving Y) Is only present when the cart is first pulled Z) Is less than the static frictional force
W: W) Has decreased
X: X) Is zero once the cart starts moving
Y: Y) Is only present when the cart is first pulled
Z: Z) Is less than the static frictional force
Answer: Z) Z) Is less than the static frictional force
Which planet maintains the highest average temperature due to its considerably thicker atmosphere?
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If the input of methane in the Martian atmosphere is 2 × 10⁶ moles per day, and 6 × 10⁸ moles are estimated to reside in the Martian atmosphere, what is the residence time of methane in days?
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A mutation that produces a dominant allele would: W) Give the bearer a selective advantage X) Result in the death of the bearer Y) Be expressed as an observable phenotype in a heterozygous organism Z) Never produce an observable phenotype
W: W) Give the bearer a selective advantage
X: X) Result in the death of the bearer
Y: Y) Be expressed as an observable phenotype in a heterozygous organism
Z: Z) Never produce an observable phenotype
Answer: Y) Y) Be expressed as an observable phenotype in a heterozygous organism
If two parents are both heterozygous for a given trait, about what percent of the time would they produce a homozygous offspring?
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What happens when metal freezes and forms a solid? W) The metal gets high electrical conductivity X) The atoms form crystals Y) The atoms have higher density Z) The atoms form liquids
W: W) The metal gets high electrical conductivity
X: X) The atoms form crystals
Y: Y) The atoms have higher density
Z: Z) The atoms form liquids
Answer: X) X) The atoms form crystals
Which of the following do NOT have liquid crystals as a possible component? W) Mood rings X) Digital thermometers Y) Stalactites Z) Laptop computers
W: W) Mood rings
X: X) Digital thermometers
Y: Y) Stalactites
Z: Z) Laptop computers
Answer: Y) Y) Stalactites
How do vaccines work to prevent illness? They: W) Stimulate production of disease-specific antibodies X) Calm the body's inflammatory response Y) Stop antihistamines from triggering an immune response Z) Alter cell surface proteins, blocking pathogens’ ability to enter the cell
W: W) Stimulate production of disease-specific antibodies
X: X) Calm the body's inflammatory response
Y: Y) Stop antihistamines from triggering an immune response
Z: Z) Alter cell surface proteins, blocking pathogens’ ability to enter the cell
Answer: W) W) Stimulate production of disease-specific antibodies
Which of the following is true about vitamins? W) Vitamins give you energy X) Vitamins are inorganic compounds low in calories that can provide energy when dieting Y) Vitamins are organic compounds and serve as a great way to maintain energy levels when you don't have time to eat Z) Vitamins do not provide energy for the body
W: W) Vitamins give you energy
X: X) Vitamins are inorganic compounds low in calories that can provide energy when dieting
Y: Y) Vitamins are organic compounds and serve as a great way to maintain energy levels when you don't have time to eat
Z: Z) Vitamins do not provide energy for the body
Answer: Z) Z) Vitamins do not provide energy for the body
The NASA “Vomit Comet” allows passengers to feel the effects of weightlessness by ascending to 30,000 feet and then dropping downward at what acceleration?
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Imagine that you tie a ball on the end of a long string and swing it around your head in a horizontal circle. If you let go of the string, where will the ball go initially? W) It will hit you in the head X) It will fall at your feet Y) It will fly up in the air Z) It will continue in the direction in which it was traveling when you let go
W: W) It will hit you in the head
X: X) It will fall at your feet
Y: Y) It will fly up in the air
Z: Z) It will continue in the direction in which it was traveling when you let go
Answer: Z) Z) It will continue in the direction in which it was traveling when you let go
The Moon’s composition is most similar to which layer of Earth? W) Crust X) Mantle Y) Core Z) Asthenosphere
W: W) Crust
X: X) Mantle
Y: Y) Core
Z: Z) Asthenosphere
Answer: W) W) Crust
Approximately how long, in days, does it take the Moon to rotate about its axis? W) It does not rotate about its axis X) 7 Y) 28 Z) 365
W: W) It does not rotate about its axis
X: X) 7
Y: Y) 28
Z: Z) 365
Answer: Y) Y) 28
Using one exterior angle per vertex, what is the sum in degrees of the measures of the exterior angles of a convex dodecagon?
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Given that $a$ is not a multiple of $\pi$, the expression \[ \frac{\cos a}{\tan a}\,\bigl(1 - \cos^2 a\bigr) \] is equivalent to which of the following expressions? W) $\cos a$ X) $\cos^2 a \,\sin a$ Y) $\sin^2 a \,\cos^2 a$ Z) $\cos^2 a$
W: W) $\cos a$
X: X) $\cos^2 a \,\sin a$
Y: Y) $\sin^2 a \,\cos^2 a$
Z: Z) $\cos^2 a$
Answer: X) X) $\cos^2 a \,\sin a$
In beats per minute, what is the normal range of resting heart rates in adults? W) 20 to 50 X) 60 to 100 Y) 80 to 120 Z) 100 to 150
W: W) 20 to 50
X: X) 60 to 100
Y: Y) 80 to 120
Z: Z) 100 to 150
Answer: X) X) 60 to 100
Name the blood type referred to as the “universal donor” because people of any blood type can accept it.
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Which of the following is used to measure the decay time for an unstable isotope? W) Radioactive-life X) Half-time Y) Isotope-time Z) Half-life
W: W) Radioactive-life
X: X) Half-time
Y: Y) Isotope-time
Z: Z) Half-life
Answer: Z) Z) Half-life
An isotope has a half-life of 26 years. If a sample of this isotope has a mass of 300.0 grams, how long will it take in years until 37.5 grams remain?
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Pure water would conduct electricity if we added to it which of the following? W) Sugar X) Alcohol Y) Salt Z) Pepper
W: W) Sugar
X: X) Alcohol
Y: Y) Salt
Z: Z) Pepper
Answer: Y) Y) Salt
A positive and negative charge are initially 1 centimeter apart. What happens to the force between them as they are moved closer and closer together?
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What do we call electrons in the outer shell of an atom that can participate in forming chemical bonds with other atoms?
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What is the maximum number of electrons that a shell of $n = 3$ can accommodate?
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Which of the following is NOT equal to $(5^2)^3$? W) $(5^3)^2$ X) $5^5$ Y) $5^6$ Z) $(5^3)(5^3)$
W: W) $(5^3)^2$
X: X) $5^5$
Y: Y) $5^6$
Z: Z) $(5^3)(5^3)$
Answer: X) X) $5^5$
Where does the graph of $y = 2x^2 - 5x - 1$ cross the x-axis?
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What region of the country has the greatest percentage of homes heated with heating oil? W) Northwest X) Northeast Y) Southwest Z) Southeast
W: W) Northwest
X: X) Northeast
Y: Y) Southwest
Z: Z) Southeast
Answer: X) X) Northeast
Which of the following is NOT a possible reason for potentially dramatic changes in home oil heating prices? W) Crude oil price changes X) Outdoor temperature Y) Insufficient supplies Z) The burning of wood
W: W) Crude oil price changes
X: X) Outdoor temperature
Y: Y) Insufficient supplies
Z: Z) The burning of wood
Answer: Z) Z) The burning of wood
Greenhouse gases in the Earth’s atmosphere are trapping excess heat, resulting in radiative imbalance. Which of the following is responsible for absorbing the greatest fraction of this excess heat? W) Ice X) Atmosphere Y) Ocean Z) Land
W: W) Ice
X: X) Atmosphere
Y: Y) Ocean
Z: Z) Land
Answer: Y) Y) Ocean
What is the largest size of sediment you would expect to find near the headwaters of a stream? W) Boulder X) Pebble Y) Gravel Z) Sand
W: W) Boulder
X: X) Pebble
Y: Y) Gravel
Z: Z) Sand
Answer: W) W) Boulder